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| ; RUN: opt < %s -gvn -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"
target triple = "i386-apple-darwin7"
define i32 @test1(i32* %b, i32* %c) nounwind {
; CHECK-LABEL: @test1(
entry:
%g = alloca i32
%t1 = icmp eq i32* %b, null
br i1 %t1, label %bb, label %bb1
bb:
%t2 = load i32, i32* %c, align 4
%t3 = add i32 %t2, 1
store i32 %t3, i32* %g, align 4
br label %bb2
bb1: ; preds = %entry
%t5 = load i32, i32* %b, align 4
%t6 = add i32 %t5, 1
store i32 %t6, i32* %g, align 4
br label %bb2
bb2: ; preds = %bb1, %bb
%c_addr.0 = phi i32* [ %g, %bb1 ], [ %c, %bb ]
%b_addr.0 = phi i32* [ %b, %bb1 ], [ %g, %bb ]
%cv = load i32, i32* %c_addr.0, align 4
%bv = load i32, i32* %b_addr.0, align 4
; CHECK: %bv = phi i32
; CHECK: %cv = phi i32
; CHECK-NOT: load
; CHECK: ret i32
%ret = add i32 %cv, %bv
ret i32 %ret
}
define i8 @test2(i1 %cond, i32* %b, i32* %c) nounwind {
; CHECK-LABEL: @test2(
entry:
br i1 %cond, label %bb, label %bb1
bb:
%b1 = bitcast i32* %b to i8*
store i8 4, i8* %b1
br label %bb2
bb1:
%c1 = bitcast i32* %c to i8*
store i8 92, i8* %c1
br label %bb2
bb2:
%d = phi i32* [ %c, %bb1 ], [ %b, %bb ]
%d1 = bitcast i32* %d to i8*
%dv = load i8, i8* %d1
; CHECK: %dv = phi i8 [ 92, %bb1 ], [ 4, %bb ]
; CHECK-NOT: load
; CHECK: ret i8 %dv
ret i8 %dv
}
define i32 @test3(i1 %cond, i32* %b, i32* %c) nounwind {
; CHECK-LABEL: @test3(
entry:
br i1 %cond, label %bb, label %bb1
bb:
%b1 = getelementptr i32, i32* %b, i32 17
store i32 4, i32* %b1
br label %bb2
bb1:
%c1 = getelementptr i32, i32* %c, i32 7
store i32 82, i32* %c1
br label %bb2
bb2:
%d = phi i32* [ %c, %bb1 ], [ %b, %bb ]
%i = phi i32 [ 7, %bb1 ], [ 17, %bb ]
%d1 = getelementptr i32, i32* %d, i32 %i
%dv = load i32, i32* %d1
; CHECK: %dv = phi i32 [ 82, %bb1 ], [ 4, %bb ]
; CHECK-NOT: load
; CHECK: ret i32 %dv
ret i32 %dv
}
; PR5313
define i32 @test4(i1 %cond, i32* %b, i32* %c) nounwind {
; CHECK-LABEL: @test4(
entry:
br i1 %cond, label %bb, label %bb1
bb:
store i32 4, i32* %b
br label %bb2
bb1:
%c1 = getelementptr i32, i32* %c, i32 7
store i32 82, i32* %c1
br label %bb2
bb2:
%d = phi i32* [ %c, %bb1 ], [ %b, %bb ]
%i = phi i32 [ 7, %bb1 ], [ 0, %bb ]
%d1 = getelementptr i32, i32* %d, i32 %i
%dv = load i32, i32* %d1
; CHECK: %dv = phi i32 [ 82, %bb1 ], [ 4, %bb ]
; CHECK-NOT: load
; CHECK: ret i32 %dv
ret i32 %dv
}
; void test5(int N, double* G) {
; for (long j = 1; j < 1000; j++)
; G[j] = G[j] + G[j-1];
; }
;
; Should compile into one load in the loop.
define void @test5(i32 %N, double* nocapture %G) nounwind ssp {
; CHECK-LABEL: @test5(
bb.nph:
br label %for.body
for.body:
%indvar = phi i64 [ 0, %bb.nph ], [ %tmp, %for.body ]
%arrayidx6 = getelementptr double, double* %G, i64 %indvar
%tmp = add i64 %indvar, 1
%arrayidx = getelementptr double, double* %G, i64 %tmp
%tmp3 = load double, double* %arrayidx
%tmp7 = load double, double* %arrayidx6
%add = fadd double %tmp3, %tmp7
store double %add, double* %arrayidx
%exitcond = icmp eq i64 %tmp, 999
br i1 %exitcond, label %for.end, label %for.body
; CHECK: for.body:
; CHECK: phi double
; CHECK: load double
; CHECK-NOT: load double
; CHECK: br i1
for.end:
ret void
}
|