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[msan] Mostly disable msan-handle-icmp-exact.

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It is way too slow. Change the default option value to 0.
Always do exact shadow propagation for unsigned ICmp with constants, it is
cheap (under 1% cpu time) and required for correctness.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173682 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evgeniy Stepanov
2013-01-28 11:42:28 +00:00
parent ccfc295b9d
commit 647c66e24d
2 changed files with 37 additions and 28 deletions
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31
test/Instrumentation/MemorySanitizer/msan_basic.ll
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@@ -323,8 +323,6 @@ define zeroext i1 @ICmpSLT(i32 %x) nounwind uwtable readnone {
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp slt
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp slt
; CHECK-NOT: call void @__msan_warning
; CHECK: ret i1
define zeroext i1 @ICmpSGE(i32 %x) nounwind uwtable readnone {
@@ -333,9 +331,7 @@ define zeroext i1 @ICmpSGE(i32 %x) nounwind uwtable readnone {
}
; CHECK: @ICmpSGE
; CHECK: icmp sge
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp sge
; CHECK: icmp slt
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp sge
; CHECK-NOT: call void @__msan_warning
@@ -347,9 +343,7 @@ define zeroext i1 @ICmpSGT(i32 %x) nounwind uwtable readnone {
}
; CHECK: @ICmpSGT
; CHECK: icmp sgt
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp sgt
; CHECK: icmp slt
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp sgt
; CHECK-NOT: call void @__msan_warning
@@ -361,9 +355,7 @@ define zeroext i1 @ICmpSLE(i32 %x) nounwind uwtable readnone {
}
; CHECK: @ICmpSLE
; CHECK: icmp sle
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp sle
; CHECK: icmp slt
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp sle
; CHECK-NOT: call void @__msan_warning
@@ -381,27 +373,26 @@ define <2 x i1> @ICmpSLT_vector(<2 x i32*> %x) nounwind uwtable readnone {
; CHECK: @ICmpSLT_vector
; CHECK: icmp slt <2 x i64>
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp slt <2 x i64>
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp slt <2 x i32*>
; CHECK-NOT: call void @__msan_warning
; CHECK: ret <2 x i1>
; Check that we propagate shadow for arbitrary relational comparisons
; Check that we propagate shadow for unsigned relational comparisons with
; constants
define zeroext i1 @ICmpSLENonZero(i32 %x, i32 %y) nounwind uwtable readnone {
define zeroext i1 @ICmpUGTConst(i32 %x) nounwind uwtable readnone {
entry:
%cmp = icmp sle i32 %x, %y
%cmp = icmp ugt i32 %x, 7
ret i1 %cmp
}
; CHECK: @ICmpSLENonZero
; CHECK: icmp sle i32
; CHECK: @ICmpUGTConst
; CHECK: icmp ugt i32
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp sle i32
; CHECK: icmp ugt i32
; CHECK-NOT: call void @__msan_warning
; CHECK: icmp sle i32
; CHECK: icmp ugt i32
; CHECK-NOT: call void @__msan_warning
; CHECK: ret i1