[llvm] abc1451 - [ConstraintElimination] Add test with pointer bitcast.

[Florian Hahn via llvm-commits]

Author: Florian Hahn
Date: 2021-02-02T17:36:05Z
New Revision: abc145182ceda3f5aec2aa64e2550f228cc87963

URL: https://github.com/llvm/llvm-project/commit/abc145182ceda3f5aec2aa64e2550f228cc87963
DIFF: https://github.com/llvm/llvm-project/commit/abc145182ceda3f5aec2aa64e2550f228cc87963.diff

LOG: [ConstraintElimination] Add test with pointer bitcast.

Added: 
    llvm/test/Transforms/ConstraintElimination/pointercast.ll

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/ConstraintElimination/pointercast.ll b/llvm/test/Transforms/ConstraintElimination/pointercast.ll
new file mode 100644
index 000000000000..f96ff189a22f
--- /dev/null
+++ b/llvm/test/Transforms/ConstraintElimination/pointercast.ll
@@ -0,0 +1,80 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; 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*
+; CHECK-NEXT:    [[MIN_C:%.*]] = bitcast i32* [[MIN:%.*]] to i8*
+; CHECK-NEXT:    [[MAX_C:%.*]] = bitcast i32* [[MAX:%.*]] to i16*
+; CHECK-NEXT:    [[GEP_3:%.*]] = getelementptr inbounds i32, i32* [[SRC]], i64 3
+; CHECK-NEXT:    [[GEP_3_C:%.*]] = bitcast i32* [[GEP_3]] to i16*
+; CHECK-NEXT:    [[C_MIN_0:%.*]] = icmp ult i8* [[SRC_C]], [[MIN_C]]
+; CHECK-NEXT:    [[C_MAX_3:%.*]] = icmp ugt i16* [[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 [[C_3_MIN]], [[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 [[C_1_MIN]], [[C_1_MAX]]
+; 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 [[C_2_MIN]], [[C_2_MAX]]
+; CHECK-NEXT:    [[GEP_4:%.*]] = getelementptr inbounds i32, i32* [[SRC]], i64 4
+; CHECK-NEXT:    [[C_4_MIN:%.*]] = icmp ult i32* [[GEP_2]], [[MIN]]
+; CHECK-NEXT:    [[C_4_MAX:%.*]] = icmp ult i32* [[GEP_2]], [[MAX]]
+; CHECK-NEXT:    [[RES_4:%.*]] = xor i1 [[C_4_MIN]], [[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 = bitcast i32* %src to i8*
+  %min.c = bitcast i32* %min to i8*
+  %max.c = bitcast i32* %max to i16*
+
+  %gep.3 = getelementptr inbounds i32, i32* %src, i64 3
+  %gep.3.c = bitcast i32* %gep.3 to i16*
+  %c.min.0 = icmp ult i8* %src.c, %min.c
+  %c.max.3 = icmp ugt i16* %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.2, %min
+  %c.4.max = icmp ult i32* %gep.2, %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
+}