[llvm] 963d3a2 - [DSE] Add additional tests to cover review comments.
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Mon Sep 20 09:07:34 PDT 2021
Author: Florian Hahn
Date: 2021-09-20T17:06:04+01:00
New Revision: 963d3a22b34de33fc41a9e3e9ac733e9b6d241be
URL: https://github.com/llvm/llvm-project/commit/963d3a22b34de33fc41a9e3e9ac733e9b6d241be
DIFF: https://github.com/llvm/llvm-project/commit/963d3a22b34de33fc41a9e3e9ac733e9b6d241be.diff
LOG: [DSE] Add additional tests to cover review comments.
Adds additional tests following comments from D109844.
Also removes unusued in.ptr arguments and places in the call tests that
used loads instead of a getval call.
Added:
Modified:
llvm/test/Transforms/DeadStoreElimination/captures-before-call.ll
llvm/test/Transforms/DeadStoreElimination/captures-before-load.ll
Removed:
################################################################################
diff --git a/llvm/test/Transforms/DeadStoreElimination/captures-before-call.ll b/llvm/test/Transforms/DeadStoreElimination/captures-before-call.ll
index 0fa2a2da2fc5..e334ad8f42a1 100644
--- a/llvm/test/Transforms/DeadStoreElimination/captures-before-call.ll
+++ b/llvm/test/Transforms/DeadStoreElimination/captures-before-call.ll
@@ -43,7 +43,7 @@ declare void @escape_and_clobber(i32*)
declare void @escape_writeonly(i32*) writeonly
declare void @clobber()
-define i32 @test_not_captured_before_call_same_bb(i32** %in.ptr) {
+define i32 @test_not_captured_before_call_same_bb() {
; CHECK-LABEL: @test_not_captured_before_call_same_bb(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
@@ -60,7 +60,7 @@ define i32 @test_not_captured_before_call_same_bb(i32** %in.ptr) {
ret i32 %r
}
-define i32 @test_not_captured_before_call_same_bb_escape_unreachable_block(i32** %in.ptr) {
+define i32 @test_not_captured_before_call_same_bb_escape_unreachable_block() {
; CHECK-LABEL: @test_not_captured_before_call_same_bb_escape_unreachable_block(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
@@ -84,28 +84,26 @@ unreach:
ret i32 0
}
-define i32 @test_captured_and_clobbered_after_load_same_bb_2(i32** %in.ptr) {
+define i32 @test_captured_and_clobbered_after_load_same_bb_2() {
; CHECK-LABEL: @test_captured_and_clobbered_after_load_same_bb_2(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
-; CHECK-NEXT: [[IN_LV_1:%.*]] = load i32*, i32** [[IN_PTR:%.*]], align 2
-; CHECK-NEXT: [[IN_LV_2:%.*]] = load i32, i32* [[IN_LV_1]], align 2
+; CHECK-NEXT: [[R:%.*]] = call i32 @getval()
; CHECK-NEXT: call void @escape_and_clobber(i32* [[A]])
; CHECK-NEXT: store i32 99, i32* [[A]], align 4
; CHECK-NEXT: call void @clobber()
-; CHECK-NEXT: ret i32 [[IN_LV_2]]
+; CHECK-NEXT: ret i32 [[R]]
;
%a = alloca i32, align 4
store i32 55, i32* %a
- %in.lv.1 = load i32* , i32** %in.ptr, align 2
- %in.lv.2 = load i32 , i32* %in.lv.1, align 2
+ %r = call i32 @getval()
call void @escape_and_clobber(i32* %a)
store i32 99, i32* %a, align 4
call void @clobber()
- ret i32 %in.lv.2
+ ret i32 %r
}
-define i32 @test_captured_after_call_same_bb_2_clobbered_later(i32** %in.ptr) {
+define i32 @test_captured_after_call_same_bb_2_clobbered_later() {
; CHECK-LABEL: @test_captured_after_call_same_bb_2_clobbered_later(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
@@ -124,7 +122,7 @@ define i32 @test_captured_after_call_same_bb_2_clobbered_later(i32** %in.ptr) {
ret i32 %r
}
-define i32 @test_captured_sibling_path_to_call_other_blocks_1(i32** %in.ptr, i1 %c.1) {
+define i32 @test_captured_sibling_path_to_call_other_blocks_1(i1 %c.1) {
; CHECK-LABEL: @test_captured_sibling_path_to_call_other_blocks_1(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
@@ -160,7 +158,7 @@ exit:
ret i32 %p
}
-define i32 @test_captured_before_call_other_blocks_2(i32** %in.ptr, i1 %c.1) {
+define i32 @test_captured_before_call_other_blocks_2(i1 %c.1) {
; CHECK-LABEL: @test_captured_before_call_other_blocks_2(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
@@ -196,7 +194,7 @@ exit:
ret i32 %p
}
-define i32 @test_captured_before_call_other_blocks_4(i32** %in.ptr, i1 %c.1) {
+define i32 @test_captured_before_call_other_blocks_4(i1 %c.1) {
; CHECK-LABEL: @test_captured_before_call_other_blocks_4(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
@@ -231,7 +229,7 @@ exit:
ret i32 %p
}
-define i32 @test_captured_before_call_other_blocks_5(i32** %in.ptr, i1 %c.1) {
+define i32 @test_captured_before_call_other_blocks_5(i1 %c.1) {
; CHECK-LABEL: @test_captured_before_call_other_blocks_5(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
@@ -262,7 +260,7 @@ exit:
ret i32 %r
}
-define i32 @test_captured_before_call_other_blocks_6(i32** %in.ptr, i1 %c.1) {
+define i32 @test_captured_before_call_other_blocks_6(i1 %c.1) {
; CHECK-LABEL: @test_captured_before_call_other_blocks_6(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
@@ -295,7 +293,7 @@ exit:
ret i32 %r
}
-define i32 @test_not_captured_before_call_other_blocks_1(i32** %in.ptr, i1 %c.1) {
+define i32 @test_not_captured_before_call_other_blocks_1(i1 %c.1) {
; CHECK-LABEL: @test_not_captured_before_call_other_blocks_1(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
@@ -327,7 +325,7 @@ exit:
ret i32 %r
}
-define i32 @test_not_captured_before_call_other_blocks_2(i32** %in.ptr, i1 %c.1) {
+define i32 @test_not_captured_before_call_other_blocks_2(i1 %c.1) {
; CHECK-LABEL: @test_not_captured_before_call_other_blocks_2(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
@@ -361,7 +359,7 @@ exit:
ret i32 %r
}
-define i32 @test_not_captured_before_call_other_blocks_3(i32** %in.ptr, i1 %c.1) {
+define i32 @test_not_captured_before_call_other_blocks_3(i1 %c.1) {
; CHECK-LABEL: @test_not_captured_before_call_other_blocks_3(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
@@ -393,7 +391,7 @@ exit:
ret i32 %r
}
-define i32 @test_not_captured_before_call_other_blocks_4(i32** %in.ptr, i1 %c.1) {
+define i32 @test_not_captured_before_call_other_blocks_4(i1 %c.1) {
; CHECK-LABEL: @test_not_captured_before_call_other_blocks_4(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
@@ -429,7 +427,7 @@ exit:
ret i32 %p
}
-define i32 @test_not_captured_before_call_other_blocks_5(i32** %in.ptr, i1 %c.1) {
+define i32 @test_not_captured_before_call_other_blocks_5(i1 %c.1) {
; CHECK-LABEL: @test_not_captured_before_call_other_blocks_5(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
@@ -462,7 +460,7 @@ exit:
ret i32 %p
}
-define i32 @test_not_captured_before_call_other_blocks_6(i32** %in.ptr, i1 %c.1) {
+define i32 @test_not_captured_before_call_other_blocks_6(i1 %c.1) {
; CHECK-LABEL: @test_not_captured_before_call_other_blocks_6(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
@@ -497,7 +495,7 @@ exit:
ret i32 %p
}
-define i32 @test_not_captured_before_call_other_blocks_7(i32** %in.ptr, i1 %c.1) {
+define i32 @test_not_captured_before_call_other_blocks_7(i1 %c.1) {
; CHECK-LABEL: @test_not_captured_before_call_other_blocks_7(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
@@ -532,7 +530,7 @@ exit:
ret i32 %p
}
-define i32 @test_not_captured_before_call_same_bb_but_read(i32** %in.ptr) {
+define i32 @test_not_captured_before_call_same_bb_but_read() {
; CHECK-LABEL: @test_not_captured_before_call_same_bb_but_read(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
@@ -553,64 +551,60 @@ define i32 @test_not_captured_before_call_same_bb_but_read(i32** %in.ptr) {
ret i32 %res
}
-define i32 @test_captured_after_loop(i32** %in.ptr, i1 %c.1) {
+define i32 @test_captured_after_loop(i1 %c.1) {
; CHECK-LABEL: @test_captured_after_loop(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
-; CHECK-NEXT: [[IN_LV_1:%.*]] = load i32*, i32** [[IN_PTR:%.*]], align 2
-; CHECK-NEXT: [[IN_LV_2:%.*]] = load i32, i32* [[IN_LV_1]], align 2
+; CHECK-NEXT: [[R:%.*]] = call i32 @getval()
; CHECK-NEXT: store i32 99, i32* [[A]], align 4
; CHECK-NEXT: br i1 [[C_1:%.*]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: call void @escape_and_clobber(i32* [[A]])
-; CHECK-NEXT: ret i32 [[IN_LV_2]]
+; CHECK-NEXT: ret i32 [[R]]
;
%a = alloca i32, align 4
store i32 55, i32* %a
br label %loop
loop:
- %in.lv.1 = load i32* , i32** %in.ptr, align 2
- %in.lv.2 = load i32 , i32* %in.lv.1, align 2
+ %r = call i32 @getval()
store i32 99, i32* %a, align 4
br i1 %c.1, label %loop, label %exit
exit:
call void @escape_and_clobber(i32* %a)
- ret i32 %in.lv.2
+ ret i32 %r
}
-define i32 @test_captured_in_loop(i32** %in.ptr, i1 %c.1) {
+define i32 @test_captured_in_loop(i1 %c.1) {
; CHECK-LABEL: @test_captured_in_loop(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 55, i32* [[A]], align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
-; CHECK-NEXT: [[IN_LV_1:%.*]] = load i32*, i32** [[IN_PTR:%.*]], align 2
-; CHECK-NEXT: [[IN_LV_2:%.*]] = load i32, i32* [[IN_LV_1]], align 2
+; CHECK-NEXT: [[R:%.*]] = call i32 @getval()
; CHECK-NEXT: call void @escape_writeonly(i32* [[A]])
; CHECK-NEXT: store i32 99, i32* [[A]], align 4
; CHECK-NEXT: br i1 [[C_1:%.*]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: call void @escape_and_clobber(i32* [[A]])
-; CHECK-NEXT: ret i32 [[IN_LV_2]]
+; CHECK-NEXT: ret i32 [[R]]
;
%a = alloca i32, align 4
store i32 55, i32* %a
br label %loop
loop:
- %in.lv.1 = load i32* , i32** %in.ptr, align 2
- %in.lv.2 = load i32 , i32* %in.lv.1, align 2
+ %r = call i32 @getval()
call void @escape_writeonly(i32* %a)
store i32 99, i32* %a, align 4
br i1 %c.1, label %loop, label %exit
exit:
call void @escape_and_clobber(i32* %a)
- ret i32 %in.lv.2
+ ret i32 %r
}
declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i1)
@@ -641,3 +635,91 @@ bb:
call void @clobber()
ret void
}
+
+
+define void @test_invoke_captures() personality i8* undef {
+; CHECK-LABEL: @test_invoke_captures(
+; CHECK-NEXT: bb:
+; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: invoke void @clobber()
+; CHECK-NEXT: to label [[BB2:%.*]] unwind label [[BB5:%.*]]
+; CHECK: bb2:
+; CHECK-NEXT: store i32 0, i32* [[A]], align 8
+; CHECK-NEXT: invoke void @escape(i32* [[A]])
+; CHECK-NEXT: to label [[BB9:%.*]] unwind label [[BB10:%.*]]
+; CHECK: bb4:
+; CHECK-NEXT: ret void
+; CHECK: bb5:
+; CHECK-NEXT: [[LP_1:%.*]] = landingpad { i8*, i32 }
+; CHECK-NEXT: cleanup
+; CHECK-NEXT: ret void
+; CHECK: bb9:
+; CHECK-NEXT: ret void
+; CHECK: bb10:
+; CHECK-NEXT: [[LP_2:%.*]] = landingpad { i8*, i32 }
+; CHECK-NEXT: cleanup
+; CHECK-NEXT: unreachable
+;
+bb:
+ %a = alloca i32
+ store i32 99, i32* %a
+ invoke void @clobber()
+ to label %bb2 unwind label %bb5
+
+bb2:
+ store i32 0, i32* %a, align 8
+ invoke void @escape(i32* %a)
+ to label %bb9 unwind label %bb10
+
+bb4:
+ ret void
+
+bb5:
+ %lp.1 = landingpad { i8*, i32 }
+ cleanup
+ ret void
+
+bb9:
+ ret void
+
+bb10:
+ %lp.2 = landingpad { i8*, i32 }
+ cleanup
+ unreachable
+}
+
+declare noalias i32* @alloc() nounwind
+declare i32 @getval_nounwind() nounwind
+
+define i32 @test_not_captured_before_load_same_bb_noalias_call() {
+; CHECK-LABEL: @test_not_captured_before_load_same_bb_noalias_call(
+; CHECK-NEXT: [[A:%.*]] = call i32* @alloc()
+; CHECK-NEXT: store i32 55, i32* [[A]], align 4
+; CHECK-NEXT: [[R:%.*]] = call i32 @getval_nounwind()
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: call void @escape_and_clobber(i32* [[A]])
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %a = call i32* @alloc()
+ store i32 55, i32* %a
+ %r = call i32 @getval_nounwind()
+ store i32 99, i32* %a, align 4
+ call void @escape_and_clobber(i32* %a)
+ ret i32 %r
+}
+
+define i32 @test_not_captured_before_load_same_bb_noalias_arg(i32* noalias %a) {
+; CHECK-LABEL: @test_not_captured_before_load_same_bb_noalias_arg(
+; CHECK-NEXT: store i32 55, i32* [[A:%.*]], align 4
+; CHECK-NEXT: [[R:%.*]] = call i32 @getval_nounwind()
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: call void @escape_and_clobber(i32* [[A]])
+; CHECK-NEXT: ret i32 [[R]]
+;
+ store i32 55, i32* %a
+ %r = call i32 @getval_nounwind()
+ store i32 99, i32* %a, align 4
+ call void @escape_and_clobber(i32* %a)
+ ret i32 %r
+}
diff --git a/llvm/test/Transforms/DeadStoreElimination/captures-before-load.ll b/llvm/test/Transforms/DeadStoreElimination/captures-before-load.ll
index ad8f6337de7d..3db3ef35f6a7 100644
--- a/llvm/test/Transforms/DeadStoreElimination/captures-before-load.ll
+++ b/llvm/test/Transforms/DeadStoreElimination/captures-before-load.ll
@@ -235,6 +235,42 @@ exit:
ret i32 %p
}
+define i32 @test_only_captured_sibling_path_with_ret_to_load_other_blocks(i32** %in.ptr, i1 %c.1) {
+; CHECK-LABEL: @test_only_captured_sibling_path_with_ret_to_load_other_blocks(
+; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
+; CHECK-NEXT: store i32 55, i32* [[A]], align 4
+; CHECK-NEXT: br i1 [[C_1:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK: then:
+; CHECK-NEXT: call void @escape_writeonly(i32* [[A]])
+; CHECK-NEXT: ret i32 0
+; CHECK: else:
+; CHECK-NEXT: [[IN_LV_1:%.*]] = load i32*, i32** [[IN_PTR:%.*]], align 2
+; CHECK-NEXT: [[IN_LV_2:%.*]] = load i32, i32* [[IN_LV_1]], align 2
+; CHECK-NEXT: br label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: call void @clobber()
+; CHECK-NEXT: ret i32 [[IN_LV_2]]
+;
+ %a = alloca i32, align 4
+ store i32 55, i32* %a
+ br i1 %c.1, label %then, label %else
+
+then:
+ call void @escape_writeonly(i32* %a)
+ ret i32 0
+
+else:
+ %in.lv.1 = load i32* , i32** %in.ptr, align 2
+ %in.lv.2 = load i32 , i32* %in.lv.1, align 2
+ br label %exit
+
+exit:
+ store i32 99, i32* %a, align 4
+ call void @clobber()
+ ret i32 %in.lv.2
+}
+
define i32 @test_captured_before_load_other_blocks_2(i32** %in.ptr, i1 %c.1) {
; CHECK-LABEL: @test_captured_before_load_other_blocks_2(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
@@ -652,6 +688,31 @@ define i32 @test_not_captured_before_load_same_bb_but_read(i32** %in.ptr) {
ret i32 %res
}
+define i32 @test_not_captured_before_load_may_alias_same_bb_but_read(i32** %in.ptr, i32* %b, i1 %c) {
+; CHECK-LABEL: @test_not_captured_before_load_may_alias_same_bb_but_read(
+; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
+; CHECK-NEXT: store i32 55, i32* [[A]], align 4
+; CHECK-NEXT: [[IN_LV_1:%.*]] = load i32*, i32** [[IN_PTR:%.*]], align 2
+; CHECK-NEXT: [[IN_LV_2:%.*]] = load i32, i32* [[IN_LV_1]], align 2
+; CHECK-NEXT: [[PTR:%.*]] = select i1 [[C:%.*]], i32* [[A]], i32* [[B:%.*]]
+; CHECK-NEXT: [[LV:%.*]] = load i32, i32* [[PTR]], align 4
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: call void @escape_and_clobber(i32* [[A]])
+; CHECK-NEXT: [[RES:%.*]] = add i32 [[IN_LV_2]], [[LV]]
+; CHECK-NEXT: ret i32 [[RES]]
+;
+ %a = alloca i32, align 4
+ store i32 55, i32* %a
+ %in.lv.1 = load i32* , i32** %in.ptr, align 2
+ %in.lv.2 = load i32 , i32* %in.lv.1, align 2
+ %ptr = select i1 %c, i32* %a, i32* %b
+ %lv = load i32, i32* %ptr
+ store i32 99, i32* %a, align 4
+ call void @escape_and_clobber(i32* %a)
+ %res = add i32 %in.lv.2, %lv
+ ret i32 %res
+}
+
define i32 @test_captured_after_loop(i32** %in.ptr, i1 %c.1) {
; CHECK-LABEL: @test_captured_after_loop(
; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
@@ -797,3 +858,215 @@ exit:
call void @escape_and_clobber(i32* %gep.a.0)
ret void
}
+
+declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #0
+declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg) #1
+
+declare void @use.i64(i64)
+
+define i64 @test_a_not_captured_at_all(i64** %ptr, i64** %ptr.2, i1 %c) {
+; CHECK-LABEL: @test_a_not_captured_at_all(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[A:%.*]] = alloca i64, align 8
+; CHECK-NEXT: [[B:%.*]] = alloca i64, align 8
+; CHECK-NEXT: store i64* [[B]], i64** [[PTR:%.*]], align 8
+; CHECK-NEXT: [[LV_1:%.*]] = load i64*, i64** [[PTR_2:%.*]], align 8
+; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[THEN:%.*]]
+; CHECK: then:
+; CHECK-NEXT: [[LV_2:%.*]] = load i64, i64* [[LV_1]], align 4
+; CHECK-NEXT: call void @use.i64(i64 [[LV_2]])
+; CHECK-NEXT: br label [[EXIT]]
+; CHECK: exit:
+; CHECK-NEXT: [[A_CAST:%.*]] = bitcast i64* [[A]] to i8*
+; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 8, i8* [[A_CAST]])
+; CHECK-NEXT: call void @clobber()
+; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* [[A_CAST]], i8 0, i64 8, i1 false)
+; CHECK-NEXT: [[L:%.*]] = load i64, i64* [[A]], align 4
+; CHECK-NEXT: ret i64 [[L]]
+;
+entry:
+ %a = alloca i64, align 8
+ %b = alloca i64, align 8
+ store i64* %b, i64** %ptr, align 8
+ %lv.1 = load i64*, i64** %ptr.2, align 8
+ br i1 %c, label %exit, label %then
+
+then:
+ %lv.2 = load i64, i64* %lv.1
+ call void @use.i64(i64 %lv.2)
+ br label %exit
+
+exit:
+ %a.cast = bitcast i64* %a to i8*
+ call void @llvm.lifetime.start.p0i8(i64 8, i8* %a.cast)
+ store i64 99, i64* %a
+ call void @clobber()
+ call void @llvm.memset.p0i8.i64(i8* %a.cast, i8 0, i64 8, i1 false)
+ %l = load i64, i64* %a
+ ret i64 %l
+}
+
+define i32 @test_not_captured_both_paths_1(i32** %in.ptr, i1 %c.1) {
+; CHECK-LABEL: @test_not_captured_both_paths_1(
+; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
+; CHECK-NEXT: store i32 55, i32* [[A]], align 4
+; CHECK-NEXT: br i1 [[C_1:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK: then:
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: call void @escape_writeonly(i32* [[A]])
+; CHECK-NEXT: br label [[EXIT:%.*]]
+; CHECK: else:
+; CHECK-NEXT: [[IN_LV_1:%.*]] = load i32*, i32** [[IN_PTR:%.*]], align 2
+; CHECK-NEXT: [[IN_LV_2:%.*]] = load i32, i32* [[IN_LV_1]], align 2
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: call void @escape_writeonly(i32* [[A]])
+; CHECK-NEXT: br label [[EXIT]]
+; CHECK: exit:
+; CHECK-NEXT: [[P:%.*]] = phi i32 [ 0, [[THEN]] ], [ [[IN_LV_2]], [[ELSE]] ]
+; CHECK-NEXT: call void @clobber()
+; CHECK-NEXT: ret i32 [[P]]
+;
+ %a = alloca i32, align 4
+ store i32 55, i32* %a
+ br i1 %c.1, label %then, label %else
+
+then:
+ store i32 99, i32* %a, align 4
+ call void @escape_writeonly(i32* %a)
+ br label %exit
+
+else:
+ %in.lv.1 = load i32* , i32** %in.ptr, align 2
+ %in.lv.2 = load i32 , i32* %in.lv.1, align 2
+ store i32 99, i32* %a, align 4
+ call void @escape_writeonly(i32* %a)
+ br label %exit
+
+exit:
+ %p = phi i32 [ 0, %then ], [ %in.lv.2, %else ]
+ call void @clobber()
+ ret i32 %p
+}
+
+define i32 @test_not_captured_both_paths_2(i32** %in.ptr, i1 %c.1) {
+; CHECK-LABEL: @test_not_captured_both_paths_2(
+; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
+; CHECK-NEXT: store i32 55, i32* [[A]], align 4
+; CHECK-NEXT: br i1 [[C_1:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK: then:
+; CHECK-NEXT: [[IN_LV_1:%.*]] = load i32*, i32** [[IN_PTR:%.*]], align 2
+; CHECK-NEXT: [[IN_LV_2:%.*]] = load i32, i32* [[IN_LV_1]], align 2
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: call void @escape_writeonly(i32* [[A]])
+; CHECK-NEXT: br label [[EXIT:%.*]]
+; CHECK: else:
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: call void @escape_writeonly(i32* [[A]])
+; CHECK-NEXT: br label [[EXIT]]
+; CHECK: exit:
+; CHECK-NEXT: [[P:%.*]] = phi i32 [ [[IN_LV_2]], [[THEN]] ], [ 0, [[ELSE]] ]
+; CHECK-NEXT: call void @clobber()
+; CHECK-NEXT: ret i32 [[P]]
+;
+ %a = alloca i32, align 4
+ store i32 55, i32* %a
+ br i1 %c.1, label %then, label %else
+
+then:
+ %in.lv.1 = load i32* , i32** %in.ptr, align 2
+ %in.lv.2 = load i32 , i32* %in.lv.1, align 2
+ store i32 99, i32* %a, align 4
+ call void @escape_writeonly(i32* %a)
+ br label %exit
+
+else:
+ store i32 99, i32* %a, align 4
+ call void @escape_writeonly(i32* %a)
+ br label %exit
+
+exit:
+ %p = phi i32 [ %in.lv.2, %then ], [ 0, %else ]
+ call void @clobber()
+ ret i32 %p
+}
+
+define i32 @test_captured_before_store_both_paths_2(i32** %in.ptr, i1 %c.1) {
+; CHECK-LABEL: @test_captured_before_store_both_paths_2(
+; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
+; CHECK-NEXT: store i32 55, i32* [[A]], align 4
+; CHECK-NEXT: br i1 [[C_1:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK: then:
+; CHECK-NEXT: call void @escape_writeonly(i32* [[A]])
+; CHECK-NEXT: [[IN_LV_1:%.*]] = load i32*, i32** [[IN_PTR:%.*]], align 2
+; CHECK-NEXT: [[IN_LV_2:%.*]] = load i32, i32* [[IN_LV_1]], align 2
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: br label [[EXIT:%.*]]
+; CHECK: else:
+; CHECK-NEXT: call void @escape_writeonly(i32* [[A]])
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: br label [[EXIT]]
+; CHECK: exit:
+; CHECK-NEXT: [[P:%.*]] = phi i32 [ [[IN_LV_2]], [[THEN]] ], [ 0, [[ELSE]] ]
+; CHECK-NEXT: call void @clobber()
+; CHECK-NEXT: ret i32 [[P]]
+;
+ %a = alloca i32, align 4
+ store i32 55, i32* %a
+ br i1 %c.1, label %then, label %else
+
+then:
+ call void @escape_writeonly(i32* %a)
+ %in.lv.1 = load i32* , i32** %in.ptr, align 2
+ %in.lv.2 = load i32 , i32* %in.lv.1, align 2
+ store i32 99, i32* %a, align 4
+ br label %exit
+
+else:
+ call void @escape_writeonly(i32* %a)
+ store i32 99, i32* %a, align 4
+ br label %exit
+
+exit:
+ %p = phi i32 [ %in.lv.2, %then ], [ 0, %else ]
+ call void @clobber()
+ ret i32 %p
+}
+
+
+declare noalias i32* @alloc() nounwind
+
+define i32 @test_not_captured_before_load_same_bb_noalias_call(i32** %in.ptr) {
+; CHECK-LABEL: @test_not_captured_before_load_same_bb_noalias_call(
+; CHECK-NEXT: [[A:%.*]] = call i32* @alloc()
+; CHECK-NEXT: store i32 55, i32* [[A]], align 4
+; CHECK-NEXT: [[IN_LV_1:%.*]] = load i32*, i32** [[IN_PTR:%.*]], align 2
+; CHECK-NEXT: [[IN_LV_2:%.*]] = load i32, i32* [[IN_LV_1]], align 2
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: call void @escape_and_clobber(i32* [[A]])
+; CHECK-NEXT: ret i32 [[IN_LV_2]]
+;
+ %a = call i32* @alloc()
+ store i32 55, i32* %a
+ %in.lv.1 = load i32* , i32** %in.ptr, align 2
+ %in.lv.2 = load i32 , i32* %in.lv.1, align 2
+ store i32 99, i32* %a, align 4
+ call void @escape_and_clobber(i32* %a)
+ ret i32 %in.lv.2
+}
+
+define i32 @test_not_captured_before_load_same_bb_noalias_arg(i32** %in.ptr, i32* noalias %a) {
+; CHECK-LABEL: @test_not_captured_before_load_same_bb_noalias_arg(
+; CHECK-NEXT: store i32 55, i32* [[A:%.*]], align 4
+; CHECK-NEXT: [[IN_LV_1:%.*]] = load i32*, i32** [[IN_PTR:%.*]], align 2
+; CHECK-NEXT: [[IN_LV_2:%.*]] = load i32, i32* [[IN_LV_1]], align 2
+; CHECK-NEXT: store i32 99, i32* [[A]], align 4
+; CHECK-NEXT: call void @escape_and_clobber(i32* [[A]])
+; CHECK-NEXT: ret i32 [[IN_LV_2]]
+;
+ store i32 55, i32* %a
+ %in.lv.1 = load i32* , i32** %in.ptr, align 2
+ %in.lv.2 = load i32 , i32* %in.lv.1, align 2
+ store i32 99, i32* %a, align 4
+ call void @escape_and_clobber(i32* %a)
+ ret i32 %in.lv.2
+}
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