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https://github.com/RPCS3/llvm-mirror.git
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29f3927372
This patch tries to transform cases like:
for (unsigned i = 0; i < N; i += 2) {
bool c0 = (i & 0x1) == 0;
bool c1 = ((i + 1) & 0x1) == 1;
}
To
for (unsigned i = 0; i < N; i += 2) {
bool c0 = true;
bool c1 = true;
}
This commit also update test/Transforms/IndVarSimplify/replace-srem-by-urem.ll to prevent constant folding.
Differential Revision: https://reviews.llvm.org/D38272
llvm-svn: 314266
110 lines
3.1 KiB
LLVM
110 lines
3.1 KiB
LLVM
; RUN: opt < %s -indvars -S | FileCheck %s
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define void @test0(i32* %a) {
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; CHECK-LABEL: @test0(
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%rem = srem i32 %i.01, 2
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; CHECK-NOT: srem
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; CHECK: urem
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%idxprom = sext i32 %rem to i64
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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store i32 %i.01, i32* %arrayidx, align 4
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%inc = add nsw i32 %i.01, 1
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%cmp = icmp slt i32 %inc, 64
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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ret void
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}
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define void @test2(i32* %a, i32 %d) {
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; CHECK-LABEL: @test2(
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%mul = mul nsw i32 %i.01, 64
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%rem = srem i32 %mul, %d
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; CHECK-NOT: urem
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%idxprom = sext i32 %rem to i64
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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store i32 %i.01, i32* %arrayidx, align 4
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%inc = add nsw i32 %i.01, 1
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%cmp = icmp slt i32 %inc, 64
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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ret void
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}
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define void @test3(i32* %a) {
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; CHECK-LABEL: @test3(
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%rem = srem i32 2048, %i.01
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; CHECK: urem
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; CHECK-NOT: srem
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%idxprom = sext i32 %rem to i64
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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store i32 %i.01, i32* %arrayidx, align 4
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%inc = add nsw i32 %i.01, 1
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%cmp = icmp slt i32 %inc, 64
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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ret void
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}
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define void @test4(i32* %a) {
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; CHECK-LABEL: @test4(
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%mul = mul nsw i32 %i.01, 64
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%rem = srem i32 %mul, 7
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; CHECK: urem
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; CHECK-NOT: srem
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%idxprom = sext i32 %rem to i64
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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store i32 %i.01, i32* %arrayidx, align 4
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%inc = add nsw i32 %i.01, 1
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%cmp = icmp slt i32 %inc, 64
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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ret void
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}
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define void @test5(i32* %a) {
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; CHECK-LABEL: @test5(
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.body
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%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%mul = mul nsw i32 %i.01, 64
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%rem = srem i32 %mul, 6
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; CHECK: urem
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; CHECK-NOT: srem
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%idxprom = sext i32 %rem to i64
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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store i32 %i.01, i32* %arrayidx, align 4
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%inc = add nsw i32 %i.01, 1
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%cmp = icmp slt i32 %inc, 64
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body
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ret void
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}
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