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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=gvn < %s | FileCheck %s
define i32 @test(ptr %p, i32 %v) {
; CHECK-LABEL: @test(
; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr [[P:%.*]]
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[LOAD]], [[V:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
; CHECK-NEXT: ret i32 [[V]]
;
%load = load i32, ptr %p
%c = icmp eq i32 %load, %v
call void @llvm.assume(i1 %c)
ret i32 %load
}
define i32 @reverse(ptr %p, i32 %v) {
; CHECK-LABEL: @reverse(
; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr [[P:%.*]]
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[LOAD]], [[V:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
; CHECK-NEXT: ret i32 [[V]]
;
%load = load i32, ptr %p
%c = icmp eq i32 %load, %v
call void @llvm.assume(i1 %c)
ret i32 %v
}
; Lack of equivalance due to +0.0 vs -0.0
define float @neg_float_oeq(ptr %p, float %v) {
; CHECK-LABEL: @neg_float_oeq(
; CHECK-NEXT: [[LOAD:%.*]] = load float, ptr [[P:%.*]]
; CHECK-NEXT: [[C:%.*]] = fcmp oeq float [[LOAD]], [[V:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
; CHECK-NEXT: ret float [[LOAD]]
;
%load = load float, ptr %p
%c = fcmp oeq float %load, %v
call void @llvm.assume(i1 %c)
ret float %load
}
; Lack of equivalance due to +0.0 vs -0.0
define float @neg_float_ueq(ptr %p, float %v) {
; CHECK-LABEL: @neg_float_ueq(
; CHECK-NEXT: [[LOAD:%.*]] = load float, ptr [[P:%.*]]
; CHECK-NEXT: [[C:%.*]] = fcmp ueq float [[LOAD]], [[V:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
; CHECK-NEXT: ret float [[LOAD]]
;
%load = load float, ptr %p
%c = fcmp ueq float %load, %v
call void @llvm.assume(i1 %c)
ret float %load
}
define float @float_oeq_constant(ptr %p) {
; CHECK-LABEL: @float_oeq_constant(
; CHECK-NEXT: [[LOAD:%.*]] = load float, ptr [[P:%.*]]
; CHECK-NEXT: [[C:%.*]] = fcmp oeq float [[LOAD]], 5.000000e+00
; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
; CHECK-NEXT: ret float 5.000000e+00
;
%load = load float, ptr %p
%c = fcmp oeq float %load, 5.0
call void @llvm.assume(i1 %c)
ret float %load
}
; Lack of equivalance due to Nan
define float @neq_float_ueq_constant(ptr %p) {
; CHECK-LABEL: @neq_float_ueq_constant(
; CHECK-NEXT: [[LOAD:%.*]] = load float, ptr [[P:%.*]]
; CHECK-NEXT: [[C:%.*]] = fcmp ueq float [[LOAD]], 5.000000e+00
; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
; CHECK-NEXT: ret float [[LOAD]]
;
%load = load float, ptr %p
%c = fcmp ueq float %load, 5.0
call void @llvm.assume(i1 %c)
ret float %load
}
define float @float_ueq_constant_nnas(ptr %p) {
; CHECK-LABEL: @float_ueq_constant_nnas(
; CHECK-NEXT: [[LOAD:%.*]] = load float, ptr [[P:%.*]]
; CHECK-NEXT: [[C:%.*]] = fcmp nnan ueq float [[LOAD]], 5.000000e+00
; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
; CHECK-NEXT: ret float 5.000000e+00
;
%load = load float, ptr %p
%c = fcmp nnan ueq float %load, 5.0
call void @llvm.assume(i1 %c)
ret float %load
}
define i32 @test2(ptr %p, i32 %v) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr [[P:%.*]]
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[LOAD]], [[V:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
; CHECK-NEXT: ret i32 [[V]]
;
%load = load i32, ptr %p
%c = icmp eq i32 %load, %v
call void @llvm.assume(i1 %c)
%load2 = load i32, ptr %p
ret i32 %load2
}
define i32 @test3(ptr %p, i32 %v) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr [[P:%.*]]
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[LOAD]], [[V:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[C]])
; CHECK-NEXT: br i1 undef, label [[TAKEN:%.*]], label [[MERGE:%.*]]
; CHECK: taken:
; CHECK-NEXT: br label [[MERGE]]
; CHECK: merge:
; CHECK-NEXT: ret i32 [[V]]
;
%load = load i32, ptr %p
%c = icmp eq i32 %load, %v
call void @llvm.assume(i1 %c)
br i1 undef, label %taken, label %merge
taken:
br label %merge
merge:
ret i32 %load
}
define i32 @trivial_constants(ptr %p) {
; CHECK-LABEL: @trivial_constants(
; CHECK-NEXT: br i1 undef, label [[TAKEN:%.*]], label [[MERGE:%.*]]
; CHECK: taken:
; CHECK-NEXT: br label [[MERGE]]
; CHECK: merge:
; CHECK-NEXT: ret i32 0
;
%c = icmp eq i32 0, 0
call void @llvm.assume(i1 %c)
br i1 undef, label %taken, label %merge
taken:
br label %merge
merge:
ret i32 0
}
define i32 @conflicting_constants(ptr %p) {
; CHECK-LABEL: @conflicting_constants(
; CHECK-NEXT: store i8 poison, ptr null
; CHECK-NEXT: br i1 undef, label [[TAKEN:%.*]], label [[MERGE:%.*]]
; CHECK: taken:
; CHECK-NEXT: br label [[MERGE]]
; CHECK: merge:
; CHECK-NEXT: ret i32 1
;
%c = icmp eq i32 0, 5
call void @llvm.assume(i1 %c)
br i1 undef, label %taken, label %merge
taken:
br label %merge
merge:
ret i32 1
}
declare void @llvm.assume(i1)
|
