[llvm] af0087c - [ConstraintElimination] Add additional pointercast tests.
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Fri Mar 26 10:52:58 PDT 2021
Author: Florian Hahn
Date: 2021-03-26T17:52:46Z
New Revision: af0087c03aae41767e14c480e88a581c36094ff0
URL: https://github.com/llvm/llvm-project/commit/af0087c03aae41767e14c480e88a581c36094ff0
DIFF: https://github.com/llvm/llvm-project/commit/af0087c03aae41767e14c480e88a581c36094ff0.diff
LOG: [ConstraintElimination] Add additional pointercast tests.
Add coverage for pointercasts other than bitcast. addrspacecast are not
handled properly at the moment.
Added:
Modified:
llvm/test/Transforms/ConstraintElimination/pointercast.ll
Removed:
################################################################################
diff --git a/llvm/test/Transforms/ConstraintElimination/pointercast.ll b/llvm/test/Transforms/ConstraintElimination/pointercast.ll
index 83e245663cda..5811b69118ca 100644
--- a/llvm/test/Transforms/ConstraintElimination/pointercast.ll
+++ b/llvm/test/Transforms/ConstraintElimination/pointercast.ll
@@ -2,7 +2,6 @@
; RUN: opt -constraint-elimination -S %s | FileCheck %s
define i1 @bitcast_and_cmp(i32* readonly %src, i32* readnone %min, i32* readnone %max) {
-;
; CHECK-LABEL: @bitcast_and_cmp(
; CHECK-NEXT: check.0.min:
; CHECK-NEXT: [[SRC_C:%.*]] = bitcast i32* [[SRC:%.*]] to i8*
@@ -79,3 +78,159 @@ checks:
ret i1 %res.7
}
+
+define i1 @gep0_and_cmp(i32* readonly %src, i32* readnone %min, i32* readnone %max) {
+; CHECK-LABEL: @gep0_and_cmp(
+; CHECK-NEXT: check.0.min:
+; CHECK-NEXT: [[SRC_C:%.*]] = getelementptr i32, i32* [[SRC:%.*]], i64 0
+; CHECK-NEXT: [[MIN_C:%.*]] = getelementptr i32, i32* [[MIN:%.*]], i64 0
+; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr inbounds i32, i32* [[SRC]], i64 3
+; CHECK-NEXT: [[GEP_3_C:%.*]] = getelementptr i32, i32* [[GEP_3]], i32 0
+; CHECK-NEXT: [[C_MIN_0:%.*]] = icmp ult i32* [[SRC_C]], [[MIN_C]]
+; CHECK-NEXT: [[C_MAX_3:%.*]] = icmp ugt i32* [[GEP_3_C]], [[MAX:%.*]]
+; CHECK-NEXT: [[OR:%.*]] = or i1 [[C_MIN_0]], [[C_MAX_3]]
+; CHECK-NEXT: br i1 [[OR]], label [[TRAP:%.*]], label [[CHECKS:%.*]]
+; CHECK: trap:
+; CHECK-NEXT: ret i1 false
+; CHECK: checks:
+; CHECK-NEXT: [[C_3_MIN:%.*]] = icmp ult i32* [[GEP_3]], [[MIN]]
+; CHECK-NEXT: [[C_3_MAX:%.*]] = icmp ult i32* [[GEP_3]], [[MAX]]
+; CHECK-NEXT: [[RES_1:%.*]] = xor i1 false, [[C_3_MAX]]
+; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr inbounds i32, i32* [[SRC]], i64 1
+; CHECK-NEXT: [[C_1_MIN:%.*]] = icmp ult i32* [[GEP_1]], [[MIN]]
+; CHECK-NEXT: [[C_1_MAX:%.*]] = icmp ult i32* [[GEP_1]], [[MAX]]
+; CHECK-NEXT: [[RES_2:%.*]] = xor i1 false, true
+; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr inbounds i32, i32* [[SRC]], i64 2
+; CHECK-NEXT: [[C_2_MIN:%.*]] = icmp ult i32* [[GEP_2]], [[MIN]]
+; CHECK-NEXT: [[C_2_MAX:%.*]] = icmp ult i32* [[GEP_2]], [[MAX]]
+; CHECK-NEXT: [[RES_3:%.*]] = xor i1 false, true
+; CHECK-NEXT: [[GEP_4:%.*]] = getelementptr inbounds i32, i32* [[SRC]], i64 4
+; CHECK-NEXT: [[C_4_MIN:%.*]] = icmp ult i32* [[GEP_4]], [[MIN]]
+; CHECK-NEXT: [[C_4_MAX:%.*]] = icmp ult i32* [[GEP_4]], [[MAX]]
+; CHECK-NEXT: [[RES_4:%.*]] = xor i1 false, [[C_4_MAX]]
+; CHECK-NEXT: [[RES_5:%.*]] = xor i1 [[RES_1]], [[RES_2]]
+; CHECK-NEXT: [[RES_6:%.*]] = xor i1 [[RES_5]], [[RES_3]]
+; CHECK-NEXT: [[RES_7:%.*]] = xor i1 [[RES_6]], [[RES_4]]
+; CHECK-NEXT: ret i1 [[RES_7]]
+;
+check.0.min:
+ %src.c = getelementptr i32, i32* %src, i64 0
+ %min.c = getelementptr i32, i32* %min, i64 0
+
+ %gep.3 = getelementptr inbounds i32, i32* %src, i64 3
+ %gep.3.c = getelementptr i32, i32* %gep.3, i32 0
+ %c.min.0 = icmp ult i32* %src.c, %min.c
+ %c.max.3 = icmp ugt i32* %gep.3.c, %max
+
+ %or = or i1 %c.min.0, %c.max.3
+ br i1 %or, label %trap, label %checks
+
+trap:
+ ret i1 0
+
+checks:
+ %c.3.min = icmp ult i32* %gep.3, %min
+ %c.3.max = icmp ult i32* %gep.3, %max
+ %res.1 = xor i1 %c.3.min, %c.3.max
+
+ %gep.1 = getelementptr inbounds i32, i32* %src, i64 1
+ %c.1.min = icmp ult i32* %gep.1, %min
+ %c.1.max = icmp ult i32* %gep.1, %max
+ %res.2 = xor i1 %c.1.min, %c.1.max
+
+ %gep.2 = getelementptr inbounds i32, i32* %src, i64 2
+ %c.2.min = icmp ult i32* %gep.2, %min
+ %c.2.max = icmp ult i32* %gep.2, %max
+ %res.3 = xor i1 %c.2.min, %c.2.max
+
+ %gep.4 = getelementptr inbounds i32, i32* %src, i64 4
+ %c.4.min = icmp ult i32* %gep.4, %min
+ %c.4.max = icmp ult i32* %gep.4, %max
+ %res.4 = xor i1 %c.4.min, %c.4.max
+
+ %res.5 = xor i1 %res.1, %res.2
+ %res.6 = xor i1 %res.5, %res.3
+ %res.7 = xor i1 %res.6, %res.4
+
+ ret i1 %res.7
+}
+
+; Should not look through addresspacecast, because it may change the pointer
+; value.
+define i1 @addrspacecast_and_cmp(i32* readonly %src, i32* readnone %min, i32* readnone %max) {
+; CHECK-LABEL: @addrspacecast_and_cmp(
+; CHECK-NEXT: check.0.min:
+; CHECK-NEXT: [[SRC_C:%.*]] = addrspacecast i32* [[SRC:%.*]] to i8 addrspace(1)*
+; CHECK-NEXT: [[MIN_C:%.*]] = addrspacecast i32* [[MIN:%.*]] to i8 addrspace(1)*
+; CHECK-NEXT: [[MAX_C:%.*]] = addrspacecast i32* [[MAX:%.*]] to i16 addrspace(1)*
+; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr inbounds i32, i32* [[SRC]], i64 3
+; CHECK-NEXT: [[GEP_3_C:%.*]] = addrspacecast i32* [[GEP_3]] to i16 addrspace(1)*
+; CHECK-NEXT: [[C_MIN_0:%.*]] = icmp ult i8 addrspace(1)* [[SRC_C]], [[MIN_C]]
+; CHECK-NEXT: [[C_MAX_3:%.*]] = icmp ugt i16 addrspace(1)* [[GEP_3_C]], [[MAX_C]]
+; CHECK-NEXT: [[OR:%.*]] = or i1 [[C_MIN_0]], [[C_MAX_3]]
+; CHECK-NEXT: br i1 [[OR]], label [[TRAP:%.*]], label [[CHECKS:%.*]]
+; CHECK: trap:
+; CHECK-NEXT: ret i1 false
+; CHECK: checks:
+; CHECK-NEXT: [[C_3_MIN:%.*]] = icmp ult i32* [[GEP_3]], [[MIN]]
+; CHECK-NEXT: [[C_3_MAX:%.*]] = icmp ult i32* [[GEP_3]], [[MAX]]
+; CHECK-NEXT: [[RES_1:%.*]] = xor i1 false, [[C_3_MAX]]
+; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr inbounds i32, i32* [[SRC]], i64 1
+; CHECK-NEXT: [[C_1_MIN:%.*]] = icmp ult i32* [[GEP_1]], [[MIN]]
+; CHECK-NEXT: [[C_1_MAX:%.*]] = icmp ult i32* [[GEP_1]], [[MAX]]
+; CHECK-NEXT: [[RES_2:%.*]] = xor i1 false, true
+; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr inbounds i32, i32* [[SRC]], i64 2
+; CHECK-NEXT: [[C_2_MIN:%.*]] = icmp ult i32* [[GEP_2]], [[MIN]]
+; CHECK-NEXT: [[C_2_MAX:%.*]] = icmp ult i32* [[GEP_2]], [[MAX]]
+; CHECK-NEXT: [[RES_3:%.*]] = xor i1 false, true
+; CHECK-NEXT: [[GEP_4:%.*]] = getelementptr inbounds i32, i32* [[SRC]], i64 4
+; CHECK-NEXT: [[C_4_MIN:%.*]] = icmp ult i32* [[GEP_4]], [[MIN]]
+; CHECK-NEXT: [[C_4_MAX:%.*]] = icmp ult i32* [[GEP_4]], [[MAX]]
+; CHECK-NEXT: [[RES_4:%.*]] = xor i1 false, [[C_4_MAX]]
+; CHECK-NEXT: [[RES_5:%.*]] = xor i1 [[RES_1]], [[RES_2]]
+; CHECK-NEXT: [[RES_6:%.*]] = xor i1 [[RES_5]], [[RES_3]]
+; CHECK-NEXT: [[RES_7:%.*]] = xor i1 [[RES_6]], [[RES_4]]
+; CHECK-NEXT: ret i1 [[RES_7]]
+;
+check.0.min:
+ %src.c = addrspacecast i32* %src to i8 addrspace(1)*
+ %min.c = addrspacecast i32* %min to i8 addrspace(1)*
+ %max.c = addrspacecast i32* %max to i16 addrspace(1)*
+
+ %gep.3 = getelementptr inbounds i32, i32* %src, i64 3
+ %gep.3.c = addrspacecast i32* %gep.3 to i16 addrspace(1) *
+ %c.min.0 = icmp ult i8 addrspace(1)* %src.c, %min.c
+ %c.max.3 = icmp ugt i16 addrspace(1)* %gep.3.c, %max.c
+
+ %or = or i1 %c.min.0, %c.max.3
+ br i1 %or, label %trap, label %checks
+
+trap:
+ ret i1 0
+
+checks:
+ %c.3.min = icmp ult i32* %gep.3, %min
+ %c.3.max = icmp ult i32* %gep.3, %max
+ %res.1 = xor i1 %c.3.min, %c.3.max
+
+ %gep.1 = getelementptr inbounds i32, i32* %src, i64 1
+ %c.1.min = icmp ult i32* %gep.1, %min
+ %c.1.max = icmp ult i32* %gep.1, %max
+ %res.2 = xor i1 %c.1.min, %c.1.max
+
+ %gep.2 = getelementptr inbounds i32, i32* %src, i64 2
+ %c.2.min = icmp ult i32* %gep.2, %min
+ %c.2.max = icmp ult i32* %gep.2, %max
+ %res.3 = xor i1 %c.2.min, %c.2.max
+
+ %gep.4 = getelementptr inbounds i32, i32* %src, i64 4
+ %c.4.min = icmp ult i32* %gep.4, %min
+ %c.4.max = icmp ult i32* %gep.4, %max
+ %res.4 = xor i1 %c.4.min, %c.4.max
+
+ %res.5 = xor i1 %res.1, %res.2
+ %res.6 = xor i1 %res.5, %res.3
+ %res.7 = xor i1 %res.6, %res.4
+
+ ret i1 %res.7
+}
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