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; RUN: opt < %s -passes=correlated-propagation -S | FileCheck %s
; Check that debug locations are preserved. For more info see:
; https://llvm.org/docs/SourceLevelDebugging.html#fixing-errors
; RUN: opt < %s -enable-debugify -passes=correlated-propagation -S 2>&1 | \
; RUN: FileCheck %s -check-prefix=DEBUG
; DEBUG: CheckModuleDebugify: PASS
; CHECK-LABEL: @test_nop
define void @test_nop(i32 %n) {
; CHECK: udiv i32 %n, 100
%div = udiv i32 %n, 100
ret void
}
; CHECK-LABEL: @test1(
define void @test1(i32 %n) {
entry:
%cmp = icmp ule i32 %n, 65535
br i1 %cmp, label %bb, label %exit
bb:
; CHECK: udiv i16
%div = udiv i32 %n, 100
br label %exit
exit:
ret void
}
; CHECK-LABEL: @test2(
define void @test2(i32 %n) {
entry:
%cmp = icmp ule i32 %n, 65536
br i1 %cmp, label %bb, label %exit
bb:
; CHECK: udiv i32 %n, 100
%div = udiv i32 %n, 100
br label %exit
exit:
ret void
}
; CHECK-LABEL: @test3(
define void @test3(i32 %m, i32 %n) {
entry:
%cmp1 = icmp ult i32 %m, 65535
%cmp2 = icmp ult i32 %n, 65535
%cmp = and i1 %cmp1, %cmp2
br i1 %cmp, label %bb, label %exit
bb:
; CHECK: udiv i16
%div = udiv i32 %m, %n
br label %exit
exit:
ret void
}
; CHECK-LABEL: @test4(
define void @test4(i32 %m, i32 %n) {
entry:
%cmp1 = icmp ult i32 %m, 65535
%cmp2 = icmp ule i32 %n, 65536
%cmp = and i1 %cmp1, %cmp2
br i1 %cmp, label %bb, label %exit
bb:
; CHECK: udiv i32 %m, %n
%div = udiv i32 %m, %n
br label %exit
exit:
ret void
}
; CHECK-LABEL: @test5
define void @test5(i32 %n) {
%trunc = and i32 %n, 65535
; CHECK: udiv i16
%div = udiv i32 %trunc, 42
ret void
}
; CHECK-LABEL: @test6
define void @test6(i32 %n) {
entry:
%cmp = icmp ule i32 %n, 255
br i1 %cmp, label %bb, label %exit
bb:
; CHECK: udiv i8
%div = sdiv i32 %n, 100
br label %exit
exit:
ret void
}
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