; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -S -passes=instcombine < %s | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
target triple = "i386-apple-darwin10.0.0"
define void @fu1(i32 %parm) #0 {
; CHECK-LABEL: define void @fu1
; CHECK-SAME: (i32 [[PARM:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT: bb:
; CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[PTR:%.*]] = alloca ptr, align 4
; CHECK-NEXT: store i32 [[PARM]], ptr [[I]], align 4
; CHECK-NEXT: store ptr null, ptr [[PTR]], align 4
; CHECK-NEXT: [[I2_NOT:%.*]] = icmp eq i32 [[PARM]], 0
; CHECK-NEXT: br i1 [[I2_NOT]], label [[BB9:%.*]], label [[BB3:%.*]]
; CHECK: bb3:
; CHECK-NEXT: [[I4:%.*]] = load i32, ptr [[I]], align 4
; CHECK-NEXT: [[I5:%.*]] = shl nuw i32 [[I4]], 3
; CHECK-NEXT: [[I6:%.*]] = add nuw i32 [[I5]], 2048
; CHECK-NEXT: [[I7:%.*]] = alloca i8, i32 [[I6]], align 1
; CHECK-NEXT: store ptr [[I7]], ptr [[PTR]], align 4
; CHECK-NEXT: br label [[BB9]]
; CHECK: bb9:
; CHECK-NEXT: [[I10:%.*]] = load ptr, ptr [[PTR]], align 4
; CHECK-NEXT: call void @bar(ptr [[I10]]) #[[ATTR1:[0-9]+]]
; CHECK-NEXT: ret void
;
bb:
%i = alloca i32, align 4
%ptr = alloca ptr, align 4
store i32 %parm, ptr %i, align 4
store ptr null, ptr %ptr, align 4
%i1 = load i32, ptr %i, align 4
%i2 = icmp ne i32 %i1, 0
br i1 %i2, label %bb3, label %bb9
bb3: ; preds = %bb
%i4 = load i32, ptr %i, align 4
%i5 = shl nuw i32 %i4, 3
; With "nuw", the alloca and its bitcast can be fused:
%i6 = add nuw i32 %i5, 2048
%i7 = alloca i8, i32 %i6, align 1
store ptr %i7, ptr %ptr, align 4
br label %bb9
bb9: ; preds = %bb3, %bb
%i10 = load ptr, ptr %ptr, align 4
call void @bar(ptr %i10)
ret void
}
declare void @bar(ptr)
define void @fu2(i32 %parm) #0 {
; CHECK-LABEL: define void @fu2
; CHECK-SAME: (i32 [[PARM:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: bb:
; CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[PTR:%.*]] = alloca ptr, align 4
; CHECK-NEXT: store i32 [[PARM]], ptr [[I]], align 4
; CHECK-NEXT: store ptr null, ptr [[PTR]], align 4
; CHECK-NEXT: [[I2_NOT:%.*]] = icmp eq i32 [[PARM]], 0
; CHECK-NEXT: br i1 [[I2_NOT]], label [[BB9:%.*]], label [[BB3:%.*]]
; CHECK: bb3:
; CHECK-NEXT: [[I4:%.*]] = load i32, ptr [[I]], align 4
; CHECK-NEXT: [[I5:%.*]] = shl nuw i32 [[I4]], 3
; CHECK-NEXT: [[I6:%.*]] = add i32 [[I5]], 2048
; CHECK-NEXT: [[I7:%.*]] = alloca i8, i32 [[I6]], align 1
; CHECK-NEXT: store ptr [[I7]], ptr [[PTR]], align 4
; CHECK-NEXT: br label [[BB9]]
; CHECK: bb9:
; CHECK-NEXT: [[I10:%.*]] = load ptr, ptr [[PTR]], align 4
; CHECK-NEXT: call void @bar(ptr [[I10]]) #[[ATTR1]]
; CHECK-NEXT: ret void
;
bb:
%i = alloca i32, align 4
%ptr = alloca ptr, align 4
store i32 %parm, ptr %i, align 4
store ptr null, ptr %ptr, align 4
%i1 = load i32, ptr %i, align 4
%i2 = icmp ne i32 %i1, 0
br i1 %i2, label %bb3, label %bb9
bb3: ; preds = %bb
%i4 = load i32, ptr %i, align 4
%i5 = mul nuw i32 %i4, 8
; Without "nuw", the alloca and its bitcast cannot be fused:
%i6 = add i32 %i5, 2048
%i7 = alloca i8, i32 %i6, align 1
store ptr %i7, ptr %ptr, align 4
br label %bb9
bb9: ; preds = %bb3, %bb
%i10 = load ptr, ptr %ptr, align 4
call void @bar(ptr %i10)
ret void
}
attributes #0 = { nounwind ssp }
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