; RUN: llc < %s -verify-machineinstrs -asm-verbose=false -mtriple=x86_64-unknown-linux-gnu -mcpu=nehalem -post-RA-scheduler=true -schedmodel=false | FileCheck %s
; Currently, floating-point selects are lowered to CFG triangles.
; This means that one side of the select is always unconditionally
; evaluated, however with MachineSink we can sink the other side so
; that it's conditionally evaluated.
; CHECK-LABEL: foo:
; CHECK-NEXT: testb $1, %dil
; CHECK-NEXT: jne
; CHECK-NEXT: divsd
; CHECK-NEXT: movapd
; CHECK-NEXT: ret
; CHECK: divsd
define double @foo(double %x, double %y, i1 %c) nounwind {
%a = fdiv double %x, 3.2
%b = fdiv double %y, 3.3
%z = select i1 %c, double %a, double %b
ret double %z
}
; Make sure the critical edge is broken so the divsd is sunken below
; the conditional branch.
; rdar://8454886
; CHECK-LABEL: split:
; CHECK-NEXT: testb $1, %dil
; CHECK-NEXT: je
; CHECK: divsd
; CHECK: movapd
; CHECK: ret
define double @split(double %x, double %y, i1 %c) nounwind {
%a = fdiv double %x, 3.2
%z = select i1 %c, double %a, double %y
ret double %z
}
; Hoist floating-point constant-pool loads out of loops.
; CHECK-LABEL: bar:
; CHECK: movsd
; CHECK: align
define void @bar(ptr nocapture %p, i64 %n) nounwind {
entry:
%0 = icmp sgt i64 %n, 0
br i1 %0, label %bb, label %return
bb:
%i.03 = phi i64 [ 0, %entry ], [ %3, %bb ]
%scevgep = getelementptr double, ptr %p, i64 %i.03
%1 = load double, ptr %scevgep, align 8
%2 = fdiv double 3.200000e+00, %1
store double %2, ptr %scevgep, align 8
%3 = add nsw i64 %i.03, 1
%exitcond = icmp eq i64 %3, %n
br i1 %exitcond, label %return, label %bb
return:
ret void
}
; Sink instructions with dead EFLAGS defs.
; FIXME: Unfail the zzz test if we can correctly mark pregs with the kill flag.
;
; See <rdar://problem/8030636>. This test isn't valid after we made machine
; sinking more conservative about sinking instructions that define a preg into a
; block when we don't know if the preg is killed within the current block.
; FIXMEHECK: zzz:
; FIXMEHECK: je
; FIXMEHECK-NEXT: orb
; define zeroext i8 @zzz(i8 zeroext %a, i8 zeroext %b) nounwind readnone {
; entry:
; %tmp = zext i8 %a to i32 ; <i32> [#uses=1]
; %tmp2 = icmp eq i8 %a, 0 ; <i1> [#uses=1]
; %tmp3 = or i8 %b, -128 ; <i8> [#uses=1]
; %tmp4 = and i8 %b, 127 ; <i8> [#uses=1]
; %b_addr.0 = select i1 %tmp2, i8 %tmp4, i8 %tmp3 ; <i8> [#uses=1]
; ret i8 %b_addr.0
; }
; Codegen should hoist and CSE these constants.
; CHECK-LABEL: vv:
; CHECK: LCPI3_0(%rip), %xmm0
; CHECK: LCPI3_1(%rip), %xmm1
; CHECK: LCPI3_2(%rip), %xmm2
; CHECK: align
; CHECK-NOT: LCPI
; CHECK: ret
@_minusZero.6007 = internal constant <4 x float> <float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00> ; <ptr> [#uses=0]
@twoTo23.6008 = internal constant <4 x float> <float 8.388608e+06, float 8.388608e+06, float 8.388608e+06, float 8.388608e+06> ; <ptr> [#uses=0]
define void @vv(ptr %y, ptr %x, ptr %n) nounwind ssp {
entry:
br label %bb60
bb: ; preds = %bb60
%i.0 = phi i32 [ 0, %bb60 ] ; <i32> [#uses=2]
%0 = load <4 x float>, ptr %x_addr.0, align 16 ; <<4 x float>> [#uses=4]
%tmp20 = bitcast <4 x float> %0 to <4 x i32> ; <<4 x i32>> [#uses=1]
%tmp22 = and <4 x i32> %tmp20, <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647> ; <<4 x i32>> [#uses=1]
%tmp23 = bitcast <4 x i32> %tmp22 to <4 x float> ; <<4 x float>> [#uses=1]
%tmp25 = bitcast <4 x float> %0 to <4 x i32> ; <<4 x i32>> [#uses=1]
%tmp27 = and <4 x i32> %tmp25, <i32 -2147483648, i32 -2147483648, i32 -2147483648, i32 -2147483648> ; <<4 x i32>> [#uses=2]
%tmp30 = call <4 x float> @llvm.x86.sse.cmp.ps(<4 x float> %tmp23, <4 x float> <float 8.388608e+06, float 8.388608e+06, float 8.388608e+06, float 8.388608e+06>, i8 5) ; <<4 x float>> [#uses=1]
%tmp34 = bitcast <4 x float> %tmp30 to <4 x i32> ; <<4 x i32>> [#uses=1]
%tmp36 = xor <4 x i32> %tmp34, <i32 -1, i32 -1, i32 -1, i32 -1> ; <<4 x i32>> [#uses=1]
%tmp37 = and <4 x i32> %tmp36, <i32 1258291200, i32 1258291200, i32 1258291200, i32 1258291200> ; <<4 x i32>> [#uses=1]
%tmp42 = or <4 x i32> %tmp37, %tmp27 ; <<4 x i32>> [#uses=1]
%tmp43 = bitcast <4 x i32> %tmp42 to <4 x float> ; <<4 x float>> [#uses=2]
%tmp45 = fadd <4 x float> %0, %tmp43 ; <<4 x float>> [#uses=1]
%tmp47 = fsub <4 x float> %tmp45, %tmp43 ; <<4 x float>> [#uses=2]
%tmp49 = call <4 x float> @llvm.x86.sse.cmp.ps(<4 x float> %0, <4 x float> %tmp47, i8 1) ; <<4 x float>> [#uses=1]
%1 = bitcast <4 x float> %tmp49 to <4 x i32> ; <<4 x i32>> [#uses=1]
%2 = call <4 x float> @llvm.x86.sse2.cvtdq2ps(<4 x i32> %1) nounwind readnone ; <<4 x float>> [#uses=1]
%tmp53 = fadd <4 x float> %tmp47, %2 ; <<4 x float>> [#uses=1]
%tmp55 = bitcast <4 x float> %tmp53 to <4 x i32> ; <<4 x i32>> [#uses=1]
%tmp57 = or <4 x i32> %tmp55, %tmp27 ; <<4 x i32>> [#uses=1]
%tmp58 = bitcast <4 x i32> %tmp57 to <4 x float> ; <<4 x float>> [#uses=1]
store <4 x float> %tmp58, ptr %y_addr.0, align 16
%3 = getelementptr float, ptr %x_addr.0, i64 4 ; <ptr> [#uses=1]
%4 = getelementptr float, ptr %y_addr.0, i64 4 ; <ptr> [#uses=1]
%5 = add i32 %i.0, 4 ; <i32> [#uses=1]
%6 = load i32, ptr %n, align 4 ; <i32> [#uses=1]
%7 = icmp sgt i32 %6, %5 ; <i1> [#uses=1]
br i1 %7, label %bb60, label %return
bb60: ; preds = %bb, %entry
%x_addr.0 = phi ptr [ %x, %entry ], [ %3, %bb ] ; <ptr> [#uses=2]
%y_addr.0 = phi ptr [ %y, %entry ], [ %4, %bb ] ; <ptr> [#uses=2]
br label %bb
return: ; preds = %bb60
ret void
}
declare <4 x float> @llvm.x86.sse.cmp.ps(<4 x float>, <4 x float>, i8) nounwind readnone
declare <4 x float> @llvm.x86.sse2.cvtdq2ps(<4 x i32>) nounwind readnone
; CodeGen should use the correct register class when extracting
; a load from a zero-extending load for hoisting.
; CHECK-LABEL: default_get_pch_validity:
; CHECK: movl cl_options_count(%rip), %ecx
@cl_options_count = external dso_local constant i32 ; <ptr> [#uses=2]
define void @default_get_pch_validity() nounwind {
entry:
%tmp4 = load i32, ptr @cl_options_count, align 4 ; <i32> [#uses=1]
%tmp5 = icmp eq i32 %tmp4, 0 ; <i1> [#uses=1]
br i1 %tmp5, label %bb6, label %bb2
bb2: ; preds = %bb2, %entry
%i.019 = phi i64 [ 0, %entry ], [ %tmp25, %bb2 ] ; <i64> [#uses=1]
%tmp25 = add i64 %i.019, 1 ; <i64> [#uses=2]
%tmp11 = load i32, ptr @cl_options_count, align 4 ; <i32> [#uses=1]
%tmp12 = zext i32 %tmp11 to i64 ; <i64> [#uses=1]
%tmp13 = icmp ugt i64 %tmp12, %tmp25 ; <i1> [#uses=1]
br i1 %tmp13, label %bb2, label %bb6
bb6: ; preds = %bb2, %entry
ret void
}
Codebase Browser
llvm