derek.holloway
7502bf64a4
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138 lines
3.5 KiB
LLVM
138 lines
3.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=ipsccp -S %s -o -| FileCheck %s
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define i64 @test1(i32 %x) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[X:%.*]], 0
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; CHECK-NEXT: br i1 [[C]], label [[TRUE:%.*]], label [[FALSE:%.*]]
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; CHECK: true:
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; CHECK-NEXT: [[EXT_1:%.*]] = zext nneg i32 [[X]] to i64
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; CHECK-NEXT: ret i64 [[EXT_1]]
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; CHECK: false:
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; CHECK-NEXT: [[EXT_2:%.*]] = sext i32 [[X]] to i64
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; CHECK-NEXT: ret i64 [[EXT_2]]
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;
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%c = icmp sgt i32 %x, 0
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br i1 %c, label %true, label %false
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true:
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%ext.1 = sext i32 %x to i64
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ret i64 %ext.1
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false:
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%ext.2 = sext i32 %x to i64
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ret i64 %ext.2
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}
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define i64 @test2(i32 %x) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[C:%.*]] = icmp sge i32 [[X:%.*]], 0
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; CHECK-NEXT: br i1 [[C]], label [[TRUE:%.*]], label [[FALSE:%.*]]
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; CHECK: true:
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; CHECK-NEXT: [[EXT_1:%.*]] = zext nneg i32 [[X]] to i64
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; CHECK-NEXT: ret i64 [[EXT_1]]
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; CHECK: false:
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; CHECK-NEXT: [[EXT_2:%.*]] = sext i32 [[X]] to i64
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; CHECK-NEXT: ret i64 [[EXT_2]]
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;
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%c = icmp sge i32 %x, 0
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br i1 %c, label %true, label %false
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true:
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%ext.1 = sext i32 %x to i64
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ret i64 %ext.1
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false:
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%ext.2 = sext i32 %x to i64
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ret i64 %ext.2
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}
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define i64 @test3(i32 %x) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[C:%.*]] = icmp sge i32 [[X:%.*]], -1
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; CHECK-NEXT: br i1 [[C]], label [[TRUE:%.*]], label [[FALSE:%.*]]
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; CHECK: true:
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; CHECK-NEXT: [[EXT_1:%.*]] = sext i32 [[X]] to i64
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; CHECK-NEXT: ret i64 [[EXT_1]]
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; CHECK: false:
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; CHECK-NEXT: [[EXT_2:%.*]] = sext i32 [[X]] to i64
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; CHECK-NEXT: ret i64 [[EXT_2]]
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;
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%c = icmp sge i32 %x, -1
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br i1 %c, label %true, label %false
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true:
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%ext.1 = sext i32 %x to i64
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ret i64 %ext.1
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false:
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%ext.2 = sext i32 %x to i64
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ret i64 %ext.2
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}
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define i64 @test4_sext_op_can_be_undef(i1 %c.1, i1 %c.2) {
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; CHECK-LABEL: @test4_sext_op_can_be_undef(
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; CHECK-NEXT: br i1 [[C_1:%.*]], label [[TRUE_1:%.*]], label [[FALSE:%.*]]
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; CHECK: true.1:
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; CHECK-NEXT: br i1 [[C_2:%.*]], label [[TRUE_2:%.*]], label [[EXIT:%.*]]
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; CHECK: true.2:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: false:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[P:%.*]] = phi i32 [ 0, [[TRUE_1]] ], [ 1, [[TRUE_2]] ], [ undef, [[FALSE]] ]
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; CHECK-NEXT: [[EXT:%.*]] = sext i32 [[P]] to i64
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; CHECK-NEXT: ret i64 [[EXT]]
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;
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br i1 %c.1, label %true.1, label %false
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true.1:
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br i1 %c.2, label %true.2, label %exit
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true.2:
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br label %exit
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false:
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br label %exit
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exit:
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%p = phi i32 [ 0, %true.1 ], [ 1, %true.2], [ undef, %false ]
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%ext = sext i32 %p to i64
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ret i64 %ext
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}
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define i64 @test5(i32 %x) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: [[P:%.*]] = and i32 [[X:%.*]], 15
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; CHECK-NEXT: [[EXT:%.*]] = zext nneg i32 [[P]] to i64
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; CHECK-NEXT: ret i64 [[EXT]]
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;
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%p = and i32 %x, 15
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%ext = sext i32 %p to i64
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ret i64 %ext
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}
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; sext is constant folded before sext -> zext conversion.
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define i64 @test6(i32 %x) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: ret i64 10
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;
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%ext = sext i32 10 to i64
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ret i64 %ext
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}
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; sext that can be converted to zext feeds another sext.
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define i64 @test7(i16 %x) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: [[P:%.*]] = and i16 [[X:%.*]], 15
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; CHECK-NEXT: [[EXT_1:%.*]] = zext nneg i16 [[P]] to i32
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; CHECK-NEXT: [[EXT_2:%.*]] = sext i32 [[EXT_1]] to i64
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; CHECK-NEXT: ret i64 [[EXT_2]]
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;
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%p = and i16 %x, 15
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%ext.1 = sext i16 %p to i32
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%ext.2 = sext i32 %ext.1 to i64
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ret i64 %ext.2
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}
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