replace-sdiv-by-udiv.ll
3.71 KB
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; RUN: opt < %s -indvars -S | FileCheck %s
define void @test0(i32* %a) {
; CHECK-LABEL: @test0(
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%div = sdiv i32 %i.01, 2
; CHECK-NOT: sdiv
; CHECK: udiv
%idxprom = sext i32 %div to i64
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
store i32 %i.01, i32* %arrayidx, align 4
%inc = add nsw i32 %i.01, 1
%cmp = icmp slt i32 %inc, 64
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body
ret void
}
define void @test1(i32* %a) {
; CHECK-LABEL: @test1(
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%div = sdiv exact i32 %i.01, 2
; CHECK-NOT: sdiv
; CHECK: udiv exact
%idxprom = sext i32 %div to i64
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
store i32 %i.01, i32* %arrayidx, align 4
%inc = add nsw i32 %i.01, 1
%cmp = icmp slt i32 %inc, 64
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body
ret void
}
define void @test2(i32* %a, i32 %d) {
; CHECK-LABEL: @test2(
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%mul = mul nsw i32 %i.01, 64
%div = sdiv i32 %mul, %d
; CHECK-NOT: udiv
%idxprom = sext i32 %div to i64
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
store i32 %i.01, i32* %arrayidx, align 4
%inc = add nsw i32 %i.01, 1
%cmp = icmp slt i32 %inc, 64
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body
ret void
}
define void @test3(i32* %a) {
; CHECK-LABEL: @test3(
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%div = sdiv i32 2048, %i.01
; CHECK: udiv
; CHECK-NOT: sdiv
%idxprom = sext i32 %div to i64
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
store i32 %i.01, i32* %arrayidx, align 4
%inc = add nsw i32 %i.01, 1
%cmp = icmp slt i32 %inc, 64
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body
ret void
}
define void @test4(i32* %a) {
; CHECK-LABEL: @test4(
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%mul = mul nsw i32 %i.01, 64
%div = sdiv i32 %mul, 8
; CHECK: udiv
; CHECK-NOT: sdiv
%idxprom = sext i32 %div to i64
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
store i32 %i.01, i32* %arrayidx, align 4
%inc = add nsw i32 %i.01, 1
%cmp = icmp slt i32 %inc, 64
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body
ret void
}
define void @test5(i32* %a) {
; CHECK-LABEL: @test5(
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%mul = mul nsw i32 %i.01, 64
%div = sdiv i32 %mul, 6
; CHECK: udiv
; CHECK-NOT: sdiv
%idxprom = sext i32 %div to i64
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
store i32 %i.01, i32* %arrayidx, align 4
%inc = add nsw i32 %i.01, 1
%cmp = icmp slt i32 %inc, 64
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body
ret void
}